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24.205.128.2
In Reply to: RE: thanks for the report posted by DannyR on June 30, 2009 at 19:00:23
No, I haven't tried the new GT re-issues, yet. As for the 6CA7... The EH 6CA7 tone doesn't compare to the original STR-6CA7 (STR-416) in Mesa Boogie's Mark III (most recent amp I've used 6CA7). The headroom and harmonics seemed to be lacking with the EH tubes.
It could be that the Mesa-Boogie just pushes the power tubes a bit too hard for the EH. I think they run about 490-500 VDC on the plates and 485-490 on the screen. Plus, all the "simul-class" grimmicks may not suit this tube well.
Most EL34 amps get the JJ or Tesla E34L, as those amps with any 6CA7 do NOT sound well (let's just say, not well to guys used to hearing EL34). I remember replacing some GE 6CA7 into a guy's Matchless Cheiftain and just that simple change made the amp sound sterile. Nice bass. Clean highs. No midrange. None of the nice harmonics that makes EL34 unique.
BTW... if you know of anyone that is selling the red or blue glass NOS Tesla EL34 (or better E34L) and the pink ceramic based STR-416 (6CA7), I'd appreciate it.
For some reason I just don't dig Mesa Boogies. Maybe I resent them for being the weapon of choice for the super crappy midrangeless Metallica tone that everyone tried to emulate after. Give me a 4 input Marshall or a Twin and I'm happy. I've always heard that Van Halen used 6CA7 in his magical head so I figured they sounded pretty good. I never had the chance to hear them in action though. From your experience with them I probably shouldn't go out of my way to.
Edits: 07/01/09
you give them 100 to 200 hours break in..They are very well made with a great vacuum and they get better and better over time.
If the power supply waveform isn't pretty,neither is the sound in most cases.
Mike, tonally they remind me of 6L6GC versus the EL34 (in a neutral sounding amp). I was just warning that in the few guitar amps that come with 6CA7 stock, Mesa-Boogie being one of them, the new EH 6CA7 which I tried, didn't seem to like the stock plate voltages and/or oddball bias settings that Mesa-Boogie had in some of their amps, at the time.
Mike, tonally they remind me of 6L6GC versus the EL34 (in a neutral sounding amp). I was just warning that in the few guitar amps that come with 6CA7 stock, Mesa-Boogie being one of them, the new EH 6CA7 which I tried, didn't seem to like the stock plate voltages and/or oddball bias settings that Mesa-Boogie had in some of their amps, at the time
Steve
I dont doubt that at all..I wish I knew more about guitar amps and I could have more input especially if I knew how to play but,we have you and a couple others so that will get us by.
If the power supply waveform isn't pretty,neither is the sound in most cases.
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